I was reading this thread and found that Redbeard offered this solution:
http://corsairmemory.com/labimages/8500c5fix.zip

Keep in mind this will only work with 8500C5 parts, and nothing else. Also, if you have non-8500C5 parts and use this file, you'll likely screw up your memory and also be out of warranty.

This will not void the warranty on 8500C5 parts, though, since there were a small number that left the factory with an SPD error due to a faulty SPD writer.
Found in this thread

Is this mandatory if you get 0.0 Cas using PC8500C5?